A Floating Ocean Platform Anchor Cable Vibration Control Damper

Abstract

The present invention relates to the technical field of vibration control, and particularly relates to a damping device for controlling the vibration of the mooring cable of a floating offshore platform. The damping device for controlling the vibration of the mooring cable of the floating offshore platform includes: a connecting hinge seat, a connecting frame, a mass block, and a connecting structure. Among them, the connecting hinge seat is used for fixed installation; one end of the connecting frame is rotatably connected to the connecting hinge seat, and the other end is used to extend into the water; the mass block is arranged at one end of the connecting frame that extends into the water; one end of the connecting structure is rotatably connected to the connecting frame, and the other end is used to be connected to the mooring cable. The rotation connection point of the connecting structure and the connecting frame is located between the rotation connection point of the connecting frame and the connecting hinge seat and the mass block, and the distance from the rotation connection point of the connecting structure and the connecting frame to the rotation connection point of the connecting frame and the connecting hinge seat is less than the horizontal distance to the mass block. It can solve the problems in the prior art that the design of the external damping device for controlling the vibration of the mooring cable of the floating offshore platform is difficult, the TMD needs to adapt to wide frequency and large amplitude, and the on-site installation is troublesome.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration control, and particularly relates to a vibration control damper for the anchor cable of a floating offshore platform. Background Art

[0002] With the continuous development of bridge construction, the construction of more and more deep-water bridges has been carried out. When the water level of a deep-water bridge is deep, changes frequently and has a large amplitude, traditional fixed construction platforms are difficult to meet the bridge construction. Due to its advantages of strong adaptability to water depth changes and little influence by water level changes, floating construction platforms have been widely used in the construction of many deep-water bridges, such as deep reservoir area bridges like Qiandao Lake Bridge, Jingtianba Bridge, Shangjiangbu Bridge, Xihoumen Road-Rail Bridge, etc. Compared with fixed platforms, floating construction platforms are mainly fixed and limited by anchor cables, and anchor cables are also widely used in suspended tunnels, floating bridges, ships, etc. The anchor cable is one of the main components of the mooring system. During its service life, in addition to transmitting the grasping force (gravity) of the anchor to balance the external forces acting on the floating platform and limit the displacement of the platform, the anchor cable also resists the dynamic loads acting on the platform to mitigate the impact of external forces on the platform. This requires it to have high strength, stiffness and good elasticity. The above characteristics are related to the material, shape and length of the anchor cable. The side anchor is greatly affected by the impact of rapids and has a large vibration amplitude. Vibration control of the load on the anchor cable can greatly improve the safety of the platform and extend the service life of the anchor cable, which has great engineering significance.

[0003] The cable force of the marine anchor cable changes with the tide level (±1.5m) and the flow velocity at all times, resulting in a natural vibration fundamental frequency range of 0.2 - 0.4Hz. The main difficulties in anchor cable vibration control are as follows: the continuous water flow excitation energy is large, the amplitude of the anchor cable is large (the maximum amplitude is greater than 10cm), the vibration frequency range is wide (0.5 - 4Hz), the fundamental frequency of the anchor cable changes with the cable force, the vibration frequency changes with the flow velocity, the anchor cable is affected by the flow direction and moves away from or approaches the platform, and the spatial inclination angle of the anchor cable is 5 - 25°. At present, the main measures for anchor cable vibration control are to change the shape of the anchor cable and the direct-connected damper measures, but they all remain at the theoretical stage. The design of external dampers is difficult, the TMD needs to adapt to wide frequency and large amplitude, and the on-site installation is troublesome. Summary of the Invention

[0004] Aiming at the defects existing in the prior art, the purpose of the present invention is to provide a vibration control damper for the anchor cable of a floating offshore platform, which can solve the problems of difficult design of external dampers for anchor cable vibration control of floating offshore platforms in the prior art, the TMD needs to adapt to wide frequency and large amplitude, and the on-site installation is troublesome.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] The present invention provides a vibration control damper for the anchor cable of a floating offshore platform, comprising:

[0007] Connecting hinge seat, which is used for fixed installation;

[0008] Connecting frame, one end of which is rotatably connected to the connecting hinge seat, and the other end is used to extend into the water;

[0009] Mass block, which is arranged at one end of the connecting frame used to extend into the water;

[0010] Connecting structure, one end of which is rotatably connected to the connecting frame, and the other end is used to connect with the cable anchor. The rotation connection point of the connecting structure and the connecting frame is located between the rotation connection point of the connecting frame and the connecting hinge seat and the mass block, and the distance from the rotation connection point of the connecting structure and the connecting frame to the rotation connection point of the connecting frame and the connecting hinge seat is less than the horizontal distance to the mass block.

[0011] In some alternative solutions, the connecting hinge seat includes:

[0012] Fixed hinge seat, which is used for fixed installation;

[0013] Connecting arm, one end of which is rotatably connected to the fixed hinge seat and can rotate horizontally relative to the fixed hinge seat, and the other end of the connecting arm is rotatably connected to the connecting frame;

[0014] Wherein, the connecting frame can rotate vertically relative to the connecting arm.

[0015] In some alternative solutions, the connecting arm includes a vertical connecting plate and a horizontal connecting plate connected perpendicular to each other, and the horizontal connecting plate is rotatably connected to the fixed hinge seat through a vertical pin shaft.

[0016] In some alternative solutions, two spaced vertical mounting plates are provided on the connecting frame, respectively located on both sides of the vertical connecting plate, and the vertical mounting plates are rotatably connected to the vertical connecting plate through a first horizontal pin shaft.

[0017] In some alternative solutions, one end of the connecting structure rotatably connected to the connecting frame is located between the two vertical mounting plates and is rotatably connected through a second horizontal pin shaft.

[0018] In some alternative solutions, the connecting structure includes a connecting system and a turnbuckle connected at one end. One end of the connecting system is used to connect with the cable anchor, and the other end of the turnbuckle is rotatably connected to the connecting structure.

[0019] In some alternative solutions, the mass block includes:

[0020] Two spaced horizontal plates, one of the horizontal plates is connected to the connecting frame;

[0021] Four vertically arranged plates evenly spaced circumferentially, the vertically arranged plates are disposed between the two horizontally arranged plates and are connected to the horizontally arranged plates;

[0022] Both the horizontally arranged plates and the vertically arranged plates are provided with through holes evenly spaced.

[0023] In some alternative embodiments, the connecting frame includes a cross bar and a vertical bar connected at one end, an installation hole is provided in the middle of the horizontally arranged plate, the vertical bar passes through the installation hole and is connected to the vertically arranged plate.

[0024] In some alternative embodiments, the other ends of the cross bar and the vertical bar are connected by an inclined bar.

[0025] In some alternative embodiments, the angle between the line connecting the rotation connection point of the connecting structure and the connecting frame and the rotation connection point of the connecting frame and the connecting hinge seat and the length direction of the connecting structure is 45° - 135°.

[0026] Compared with the prior art, the advantages of the present invention are as follows: When the anchor cable vibrates, the vibration displacement will be transmitted to the connecting frame through the connecting structure. The rotation connection point of the connecting structure and the connecting frame is located between the rotation connection point of the connecting frame and the connecting hinge seat and the mass block. The connecting structure will transmit the vibration displacement to the mass block. Since the mass block is provided at one end of the connecting frame for extending into the water, the mass block will sway in the water to generate damping, and part of the connecting frame is also located in the water, and damping can also be generated during swaying. Therefore, this device does not need to add other damping energy dissipation devices, and can apply both inertial force and damping force to the anchor cable. The distance from the rotation connection point of the connecting structure and the connecting frame to the rotation connection point of the connecting frame and the connecting hinge seat is less than the horizontal distance to the mass block. The combination of the connecting frame and the connecting hinge seat forms a magnification structure, which can magnify the vibration displacement transmitted from the anchor cable to the connecting frame through the connecting structure and transmit it to the mass block, thereby providing greater damping and damping the smaller vibration displacement of the anchor cable. Description of the Drawings

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 It is a schematic structural diagram of a floating offshore platform anchor cable vibration control damper in an embodiment of the present invention;

[0029] Figure 2 It is a schematic diagram of a connecting hinge seat, a connecting frame and a mass block of the present invention;

[0030] Figure 3Schematic structural diagram of the connecting arm in the present invention;

[0031] Figure 4 Schematic structural diagram of the mass block in the present invention;

[0032] Figure 5 Schematic diagram of the amplitude comparison of the cable before and after installing the damper of the present invention;

[0033] Figure 6 Schematic diagram of the acceleration comparison of the cable before and after installing the damper of the present invention.

[0034] In the figure: 1. Connecting hinge seat; 11. Fixed hinge seat; 12. Connecting arm; 121. Vertical connecting plate; 122. Horizontal connecting plate; 13. Vertical pin shaft; 14. First horizontal pin shaft; 15. Second horizontal pin shaft; 2. Connecting frame; 21. Vertical mounting plate; 22. Cross bar; 23. Vertical bar; 24. Diagonal bar; 3. Mass block; 31. Horizontal plate; 311. Through hole; 32. Vertical plate; 33. Mounting hole; 4. Connecting structure; 41. Connecting system; 42. Turnbuckle; 5. Cable; 6. Lock clip. Detailed implementation manners

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0036] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] As Figure 1 and Figure 2 shown, on the one hand, the present invention provides a floating offshore platform cable vibration control damper, including: a connecting hinge seat 1, a connecting frame 2, a mass block 3, and a connecting structure 4. Among them, the connecting hinge seat 1 is used for fixed installation; one end of the connecting frame 2 is rotatably connected to the connecting hinge seat 1, and the other end is used to extend into the water; the mass block 3 is arranged at one end of the connecting frame 2 that extends into the water; one end of the connecting structure 4 is rotatably connected to the connecting frame 2, and the other end is used to connect to the cable 5. The rotation connection point of the connecting structure 4 and the connecting frame 2 is located between the rotation connection point of the connecting frame 2 and the connecting hinge seat 1 and the mass block 3, and the distance from the rotation connection point of the connecting structure 4 and the connecting frame 2 to the rotation connection point of the connecting frame 2 and the connecting hinge seat 1 is less than the horizontal distance to the mass block 3.

[0038] When using the cable vibration control damper of the floating offshore platform, one end of the connecting system is connected to the cable 5, the connecting hinge base 1 is fixed on the offshore platform column, one end of the connecting frame 2 is rotatably connected to the connecting hinge base 1, and the other end extends into the water. Moreover, the mass block 3 is connected to the end of the connecting frame 2 for extending into the water. The connecting point of the connecting structure 4 and the connecting frame 2 is located between the connecting point of the connecting frame 2 and the connecting hinge base 1 and the mass block 3. When the cable 5 vibrates, the vibration displacement will be transmitted to the connecting frame 2 through the connecting structure 4. The connecting point of the connecting structure 4 and the connecting frame 2 is located between the connecting point of the connecting frame 2 and the connecting hinge base 1 and the mass block 3. The connecting structure 4 will transmit the vibration displacement to the mass block 3. Since the mass block 3 is arranged at the end of the connecting frame 2 for extending into the water, the mass block 3 will sway in the water to generate damping. Part of the connecting frame 2 is also in the water and can also generate damping when swaying. Therefore, this device does not need to add other damping energy-consuming devices and can apply inertial force and damping force to the cable at the same time.

[0039] In addition, the distance from the connecting point of the connecting structure 4 and the connecting frame 2 to the connecting point of the connecting frame 2 and the connecting hinge base 1 is less than the horizontal distance to the mass block 3. The combination of the connecting frame 2 and the connecting hinge base 1 forms an amplification structure, which can amplify the vibration displacement transmitted from the cable 5 to the connecting frame 2 through the connecting structure 4 and transmit it to the mass block 3, so as to provide greater damping and reduce the vibration of the cable 5 with a smaller vibration displacement.

[0040] In some alternative embodiments, the connecting hinge base 1 includes a fixed hinge base 11 and a connecting arm 12. Among them, the fixed hinge base 11 is used for fixed installation; one end of the connecting arm 12 is rotatably connected to the fixed hinge base 1 and can rotate horizontally relative to the fixed hinge base 1, and the other end of the connecting arm 12 is rotatably connected to the connecting frame 2; the connecting frame 2 can rotate vertically relative to the connecting arm 12.

[0041] In this embodiment, the fixed hinge base 11 is fixed on the column of the offshore platform. One end of the connecting arm 12 is rotatably connected to the fixed hinge base 11 in the horizontal direction, and the connecting frame 2 is rotatably connected to the connecting arm 12 in the vertical direction. When the cable anchor 5 vibrates in the vertical direction, since the connecting frame 2 is rotatably connected to the connecting arm 12 in the vertical direction, after the connecting structure 4 transmits the vertical vibration of the cable anchor 5 to the connecting frame 2, the connecting frame 2 vibrates in the vertical direction, and the mass block 3 will sway in the water in the vertical direction to generate damping, thereby reducing the vertical vibration of the cable anchor 5. When the cable anchor 5 vibrates in the horizontal direction, since one end of the connecting arm 12 is rotatably connected to the fixed hinge base 11 in the horizontal direction, after the connecting structure 4 transmits the horizontal vibration of the cable anchor 5 to the connecting frame 2, the connecting frame 2 vibrates in the horizontal direction, and the mass block 3 will sway in the water in the horizontal direction to generate damping, thereby reducing the horizontal vibration of the cable anchor 5. In this example, through the horizontal rotational connection mode between the fixed hinge base 11 and the connecting arm 12, and the vertical rotational connection mode between the connecting arm 12 and the connecting frame 2, the vibration reduction of the cable anchor 5 in the horizontal and vertical directions can be realized.

[0042] As Figure 3 shown, in some alternative embodiments, the connecting arm 12 includes a vertical connecting plate 121 and a horizontal connecting plate 122 that are perpendicularly connected to each other. The horizontal connecting plate 122 is rotatably connected to the fixed hinge base 11 through a vertical pin shaft 13.

[0043] In this embodiment, by using the vertical connecting plate 121 and the horizontal connecting plate 122 that are perpendicularly connected to each other at the end as the connecting arm 12, the rotational connection between the connecting frame 2 and the connecting hinge base 1 in the horizontal and vertical directions is realized. Moreover, in this example, the vertical connecting plate 121 extends a set length on both sides of the horizontal connecting plate 122, and the horizontal connecting plate 122 extends a set length on both sides of the vertical connecting plate 121, which can improve the strength of the connecting arm 12.

[0044] As Figure 3 shown, in some alternative embodiments, two spaced vertical mounting plates 21 are provided on the connecting frame 2, respectively located on both sides of the vertical connecting plate 121. The vertical mounting plates 21 are rotatably connected to the vertical connecting plate 121 through a first horizontal pin shaft 14.

[0045] In some alternative embodiments, shaft holes are provided on both of the two spaced vertical mounting plates 21, and corresponding shaft holes are provided on the vertical connecting plate 121. By passing the first horizontal pin shaft 14 through the shaft holes, the vertical rotational connection between the vertical mounting plates 21 and the vertical connecting plate 121 is realized.

[0046] In some alternative embodiments, one end of the connecting structure 4 that is rotatably connected to the connecting frame 2 is located between the two vertical mounting plates 21 and is rotatably connected through a second horizontal pin shaft 15.

[0047] In this embodiment, the connecting structure 4 is arranged between two vertical mounting plates 21, and the second horizontal pin shaft 15 passes through the connecting structure 4 and the vertical mounting plate 21 to realize the vertical rotational connection between the connecting structure 4 and the connecting frame 2. In addition, the first horizontal pin shaft 14, the second horizontal pin shaft 15 and the two vertical mounting plates 21 realize the rotational connection of both the connecting arm 12 and the connecting structure 4 relative to the vertical mounting plate 21, that is, the rotational connection between the connecting frame 2 and the connecting structure 4 and the connecting arm 12, and the distance between the first horizontal pin shaft 14 and the second horizontal pin shaft 15 can be made relatively close, that is, the distance from the rotational connection point between the connecting structure 4 and the connecting frame 2 to the rotational connection point between the connecting frame 2 and the connecting hinge base 1 is relatively close, and they are basically located at one end of the connecting frame 2, so that the distance from the rotational connection point between the connecting structure 4 and the connecting frame 2 to the rotational connection point between the connecting frame 2 and the connecting hinge base 1 is much smaller than the horizontal distance to the mass block 3, generally more than 10 times, thereby realizing a vibration displacement amplification of more than 10.

[0048] In some alternative embodiments, the connecting structure 4 includes a connecting system 41 and a turnbuckle 42 connected at one end. One end of the connecting system 41 is used to connect with the anchor cable 5, and the other end of the turnbuckle 42 is rotationally connected to the connecting structure 4.

[0049] In this embodiment, during use, one end of the connecting system 41 and the turnbuckle 42 are connected, the other end of the connecting system 41 is connected to the anchor cable 5 through a locking clip 6, and the other end of the turnbuckle 42 is rotationally connected to the connecting structure 4. In order to make the mass block 3 in a more appropriate state in water when the anchor cable 5 is not vibrating, and make the entire connecting structure 4 in a taut state and facilitate installation, the connecting system 41 can be in a relatively loose state during connection. After connecting the connecting system 41 and the turnbuckle 42, the connecting system 41 is adjusted to a taut state by adjusting the turnbuckle 42. In this example, the connecting system 41 is made of a steel wire rope.

[0050] As Figure 4 shown, in some alternative embodiments, the mass block 3 includes: two horizontally arranged plates 31 spaced apart and four vertically arranged plates 32 circumferentially and evenly arranged. Among them, one horizontally arranged plate 31 is connected to the connecting frame 2; the four vertically arranged plates 32 circumferentially and evenly arranged are arranged between the two horizontally arranged plates 31 and are connected to the horizontally arranged plates 31. Through holes 311 are evenly spaced on both the horizontally arranged plates 31 and the vertically arranged plates 32.

[0051] In this embodiment, the mass block 3 is required to provide additional inertial force, as well as damping in the horizontal and vertical directions. The mass block 3 can automatically provide additional inertial force. The mass block 3 is designed to include two horizontally arranged plates 31 spaced apart and four vertically arranged plates 32 evenly arranged circumferentially. When the horizontal plates 31 sway in water, they can provide damping force in the vertical direction. When the vertical plates 32 sway in water, they provide damping force in the horizontal direction, thus achieving the effect of not requiring additional damping energy dissipation devices. In addition, through holes 311 are evenly spaced on both the horizontal plates 31 and the vertical plates 32, which can prevent the instantaneous damping force provided by the horizontal plates 31 and the vertical plates 32 from being too large. The through holes 311 can allow water to flow through, reducing the instantaneous damping force.

[0052] In other embodiments, a single horizontal plate 31 can also be used, and four vertically arranged plates 32 evenly arranged circumferentially are provided on one side of the horizontal plate 31, or the vertical plates 32 are evenly divided into two segments and located on both sides of the horizontal plate 31, which can achieve the same effect.

[0053] In some alternative embodiments, the connecting frame 2 includes a cross bar 22 and a vertical bar 23 connected at one end. An installation hole 33 is provided in the middle of the horizontal plate 31. The vertical bar 23 passes through the installation hole 33 and is connected to the vertical plate 32.

[0054] In this embodiment, the cross bar 22 and the vertical bar 23 are perpendicularly connected at the ends. The vertical bar 23 passes through the installation hole 33 in the middle of the horizontal plate 31 and is connected to the vertical plate 32 and the horizontal plate 31, which can improve the connection strength between the connecting frame 2 and the mass block 3. Moreover, in this example, 80% of the vertical bar 23 is immersed in water, which can provide damping together with the mass block 3.

[0055] In some alternative embodiments, the other ends of the cross bar 22 and the vertical bar 23 are connected by an inclined bar 24.

[0056] In this embodiment, the other ends of the cross bar 22 and the vertical bar 23 are connected by an inclined bar 24, which can improve the strength of the connecting frame 2.

[0057] In some alternative embodiments, the included angle between the connection line between the rotation connection point of the connection structure 4 and the connecting frame 2 and the rotation connection point of the connecting frame 2 and the connection hinge seat 1 and the length direction of the connection structure 4 is 45° - 135°.

[0058] In this embodiment, the optimal included angle between the connection line between the rotation connection point of the connection structure 4 and the connecting frame 2 and the rotation connection point of the connecting frame 2 and the connection hinge seat 1 and the length direction of the connection structure 4 is 90°. This can better transfer the vibration displacement of the anchor cable 5 to the mass block 3.

[0059] Such as Figure 1As shown, the connection system 41 is connected to the connection point A of the cable anchor 5 through the locking clip 6. The rotation connection point of the connection structure 4 and the connection bracket 2 is B, the rotation connection point of the connection bracket 2 and the connection hinge base 1 is C, and the center of gravity position of the mass block 3 is D. To ensure the amplification effect, points A, B, and C are not collinear, and AB is perpendicular to BC, or ∠ABC is as large as possible, greater than 45 degrees and less than 135 degrees. When AB is perpendicular to BC, according to the static equilibrium relationship: Mg*X CD = F*BC, the initial tension F of the steel wire rope can be obtained. Mg is the self-weight of the mass block 3, and X CD is the horizontal distance between point C and point D, and BC is the distance between point B and point C.

[0060] When using this floating offshore platform cable anchor vibration control damper, one end of the connection system is connected to the cable anchor 5, the connection hinge base 1 is fixed on the offshore platform column, one end of the connection bracket 2 is rotationally connected to the connection hinge base 1, and the other end extends into the water. And the end of the connection bracket 2 where the mass block 3 is connected, the rotation connection point of the connection structure 4 and the connection bracket 2 is located between the rotation connection point of the connection bracket 2 and the connection hinge base 1 and the mass block 3. When the cable anchor 5 vibrates, the vibration displacement will be transmitted to the connection bracket 2 through the connection structure 4. The rotation connection point of the connection structure 4 and the connection bracket 2 is located between the rotation connection point of the connection bracket 2 and the connection hinge base 1 and the mass block 3. The connection structure 4 will transmit the vibration displacement to the mass block 3. Since the mass block 3 is arranged at the end of the connection bracket 2 that extends into the water, the mass block 3 will sway in the water to generate damping, and part of the connection bracket 2 is also in the water, and damping can also be generated during swaying. Therefore, this device does not need to add other damping energy-consuming devices and can apply inertial force and damping force to the cable anchor at the same time.

[0061] In addition, the distance from the rotation connection point of the connection structure 4 and the connection bracket 2 to the rotation connection point of the connection bracket 2 and the connection hinge base 1 is less than the horizontal distance to the mass block 3. The combination of the connection bracket 2 and the connection hinge base 1 forms an amplification structure, which can amplify the vibration displacement transmitted from the cable anchor 5 to the connection bracket 2 through the connection structure 4 and transmit it to the mass block 3, so as to provide greater damping and reduce the vibration displacement of the cable anchor 5 with a smaller value.

[0062] When the anchor cable 5 vibrates in the vertical direction, since the connecting frame 2 and the connecting arm 12 are rotatably connected in the vertical direction, after the connecting structure 4 transmits the vertical vibration of the anchor cable 5 to the connecting frame 2, the connecting frame 2 vibrates in the vertical direction, and the mass block 3 will sway in the water in the vertical direction to generate damping, thereby reducing the vertical vibration of the anchor cable 5. When the anchor cable 5 vibrates in the horizontal direction, since one end of the connecting arm 12 is rotatably connected to the fixed hinge seat 11 in the horizontal direction, after the connecting structure 4 transmits the horizontal vibration of the anchor cable 5 to the connecting frame 2, the connecting frame 2 vibrates in the horizontal direction, and the mass block 3 will sway in the water in the horizontal direction to generate damping, thereby reducing the horizontal vibration of the anchor cable 5. In this example, through the horizontal rotational connection mode between the fixed hinge seat 11 and the connecting arm 12, and the vertical rotational connection mode between the connecting arm 12 and the connecting frame 2, the vibration reduction of the anchor cable 5 in the horizontal and vertical directions can be achieved.

[0063] Figure 5 It is a schematic diagram of the amplitude comparison of the anchor cable before and after installing this damper in the present invention; Figure 6 It is a schematic diagram of the acceleration comparison of the anchor cable before and after installing this damper in the present invention. As Figure 5 and Figure 6 shown, the acceleration and amplitude of the anchor cable have been significantly improved after installing this damper.

[0064] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to this application. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0065] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0066] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A floating offshore platform cable vibration control damper, characterized in that, Comprising: A connecting hinge base (1) for fixed installation; A connecting frame (2), one end of which is rotatably connected to the connecting hinge base (1), and the other end is for extending into water; A mass block (3) provided at the end of the connecting frame (2) for extending into water; A connecting structure (4), one end of which is rotatably connected to the connecting frame (2), and the other end is for connecting to an anchor cable (5). The rotation connection point of the connecting structure (4) and the connecting frame (2) is located between the rotation connection point of the connecting frame (2) and the connecting hinge base (1) and the mass block (3). And the distance from the rotation connection point of the connecting structure (4) and the connecting frame (2) to the rotation connection point of the connecting frame (2) and the connecting hinge base (1) is less than the horizontal distance to the mass block (3); The connecting structure (4) includes a connecting line (41) and a turnbuckle (42) connected at one end. The other end of the connecting line (41) is for connecting to the anchor cable (5), and the other end of the turnbuckle (42) is rotatably connected to the connecting frame (2); The included angle between the connection line between the rotation connection point of the connecting structure (4) and the connecting frame (2) and the rotation connection point of the connecting frame (2) and the connecting hinge base (1) and the length direction of the connecting structure (4) is 45° - 135°; 2. The floating offshore platform anchor cable vibration control damper according to claim 1, characterized in that, The connecting hinge base (1) includes: A fixed hinge base (11) for fixed installation; A connecting arm (12), one end of which is rotatably connected to the fixed hinge base (11) and can rotate horizontally relative to the fixed hinge base (11). The other end of the connecting arm (12) is rotatably connected to the connecting frame (2); Wherein, the connecting frame (2) can rotate vertically relative to the connecting arm (12); 3. The floating offshore platform cable vibration control damper according to claim 2, wherein, The connecting arm (12) includes a vertical connecting plate (121) and a horizontal connecting plate (122) connected perpendicularly to each other. The horizontal connecting plate (122) is rotatably connected to the fixed hinge base (11) through a vertical pin shaft (13); 4. The floating offshore platform anchor cable vibration control damper according to claim 3, characterized in that, Two spaced vertical mounting plates (21) are provided on the connecting frame (2), located on both sides of the vertical connecting plate (121) respectively. The vertical mounting plates (21) are rotatably connected to the vertical connecting plate (121) through a first horizontal pin shaft (14); 5. The floating offshore platform anchor cable vibration control damper according to claim 4, characterized in that, One end of the connecting structure (4) rotatably connected to the connecting frame (2) is located between the two vertical mounting plates (21) and is rotatably connected through a second horizontal pin shaft (15); 6. The floating offshore platform anchor cable vibration control damper according to claim 1, wherein, The mass block (3) includes: Two spaced horizontal plates (31), one of the horizontal plates (31) is connected to the connecting frame (2); Four vertically arranged vertical plates (32) evenly arranged circumferentially. The vertical plates (32) are provided between the two horizontal plates (31) and are connected to the horizontal plates (31); Through holes (311) are evenly spaced on both the horizontal plates (31) and the vertical plates (32).

7. The floating offshore platform anchor cable vibration control damper according to claim 6, characterized in that, The connecting frame (2) includes a cross bar (22) and a vertical bar (23) connected at one end. An installation hole (33) is provided in the middle of the horizontal plate (31). The vertical bar (23) passes through the installation hole (33) and is connected to the vertical plate (32).

8. The floating offshore platform anchor cable vibration control damper according to claim 7, wherein The other ends of the cross bar (22) and the vertical bar (23) are connected by an inclined bar (24).

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